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Finding the Fourth Proportional to 10,115.74, 15,173.88 and 3,878.74

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Solution

The fourth proportional to 10,115.74, 15,173.88 and 3,878.74 is: 5,818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.74 : 15,173.88 = 3,878.74 : x
  2. Step 2: Convert to fraction form
    10,115.74/15,173.88 = 3,878.74/x
  3. Step 3: Cross multiply
    10,115.74x = 15,173.88 × 3,878.74
  4. Step 4: Simplify right side
    10,115.74x = 58,855,535.31
  5. Step 5: Solve for x
    x = 58,855,535.31/10,115.74
  6. Step 6: Final answer
    x = 5,818.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.